"Unrepentant sin" refers to committing a wrong or harmful action without feeling remorse or making an effort to change or apologize for it. Full definition
Can one truly be a Christian while at the same time harboring unrepentant sin (such as hate)? (religion.blogs.cnn.com)
Thus Jesus» teaching is that an heir or child of God who is alive in Christ can indeed experience spiritual death if he / she sows to a lifestyle of unrepentant sin. (redeeminggod.com)
Never mind, it's foundation covers up my unrepentant sin and suffering of those who dared to get in my way. (nakedpastor.com)